use serde::de::{self, Deserializer, Visitor};use std::fmt; /// Deserializes a non-empty string array.pub fn non_empty_string_vec<'de, D>(deserializer: D) -> Result<Vec<String>, D::Error>where    D: Deserializer<'de>,{    struct NonEmptyStringVecVisitor;     impl<'de> Visitor<'de> for NonEmptyStringVecVisitor {        type Value = Vec<String>;         fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {            formatter.write_str("a list of non-empty strings")        }         fn visit_seq<V>(self, mut seq: V) -> Result<Vec<String>, V::Error>        where            V: de::SeqAccess<'de>,        {            let mut vec = Vec::new();            while let Some(value) = seq.next_element::<String>()? {                if value.is_empty() {                    return Err(de::Error::invalid_value(                        de::Unexpected::Str(&value),                        &"a non-empty string",                    ));                }                vec.push(value);            }            Ok(vec)        }    }     deserializer.deserialize_seq(NonEmptyStringVecVisitor)}